paper

Constraints on holographic dark energy from type Ia supernova observations

arXiv:astro-ph/0506310 · doi:10.1103/PhysRevD.72.043524

Abstract

In this paper, we use the type Ia supernovae data to constrain the holographic dark energy model proposed by Li. We also apply a cosmic age test to this analysis. We consider in this paper a spatially flat Friedmann-Robertson-Walker Universe with matter component and holographic dark energy component. The fit result shows that the case () is favored, which implies that the holographic dark energy behaves as a quintom-type dark energy. Furthermore, we also perform a joint analysis of SNe+CMB+LSS to this model; the result is well improved, and still upholds the quintom dark energy conclusion. The best fit results in our analysis are , , and , which lead to the present equation of state of dark energy and the deceleration/acceleration transition redshift . Finally, an expected SNAP simulation using CDM as a fiducial model is performed on this model, and the result shows that the holographic dark energy model takes on () even though the dark energy is indeed a cosmological constant.

21 pages, 9 figures. v2: Typos corrected; References added; A joint analysis of SNe+CMB+LSS added, and 3 figures and some references added accordingly. v3: Typos corrected; to appear in Phys. Rev. D

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